Applying laboratory results to the field: In situ bioremediation of TCE
Conference
·
OSTI ID:210544
- Woodward-Clyde Consultants, Phoenix, AZ (United States)
Based on the results of bench-scale testing using groundwater and soil collected from a trichloroethylene (TCE)-contaminated aquifer, the critical elements to promoting bioremediation of TCE were oxygen and nutrients. Further laboratory study verified TCE biodegradation in site groundwater without the addition of a cometabolic inducer under aerobic conditions. To evaluate the effectiveness of injecting an oxygen source and nutrients into the aquifer for site remediation, a pilot-scale study was initiated. The testing plan included a bromide tracer study, an aquifer pump test, and multiple operational modes to evaluate contaminant dilution during reinjection scenarios, preferential flow due to aquifer heterogeneities, and bioremediation of TCE. Construction and permitting activities associated with an integrated above-ground and in situ treatment facility were completed in July of 1994. To date amendment of extracted groundwater with hydrogen peroxide and nutrients prior to reinjection has resulted in high levels of dissolved oxygen and a steady decrease in TCE concentrations in site monitoring wells.
- OSTI ID:
- 210544
- Report Number(s):
- CONF-9509139--
- Country of Publication:
- United States
- Language:
- English
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